拨叉零件加工工艺及夹具设计.doc

拨叉零件加工工艺及夹具设计此次设计是对拨叉零件的加工工艺和夹具设计，其零件为锻件，具有体积小，零件复杂的特点，由于面比孔易加工，在制定工艺规程时，就先加工面，再以面为基准来加工其它，其中各工序夹具都采用专用夹具，特别的对于加工大头孔、槽和钻小头孔斜面小孔的工序中，选一面两销的定位方式，并以操作简单的手动夹紧方式夹紧，其机构设计简单，方便且能满足要求。 关键词 ?拨叉，加工工艺，专用夹具，设计 【拨叉零件加 工艺及夹具设计】包含资料有： word毕业论文文献综述、毕业设计说明书-拨叉加工工艺及夹具设计；CAD机械加工工序卡片、机械加工工艺过程卡片、镗孔夹具装配图及零件图、铣槽夹具装配及零件图、钻孔夹具装配及零件图 拨叉零件加工工艺及夹具设计 目? 录 摘?? 要···········································································································I ABSTRACT···································································································Ⅱ 1?? 绪 论·········································································································1 2 拨叉的分析··································································································2 2.1拨叉的工艺分析·························································································· 2 2.2拨叉的工艺要求··· ·······················································································2 3工艺规程设计··· ·····························································································5 3.1 加工工艺过程·····························································································5 3.2确定各表面加工方案····················································································5 3.2.1影响加工方法的因素·················································································5 3.2.2加工方案的选择·······················································································6 3.3 确定定位基准·····························································································6 3.2.1粗基准的选择·························································································· 6 3.2.1精基准选择的原则····················································································7 3.4工艺路线的拟订··························································································7 3.4.1工序的合理组合······················································································· 8 3.